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Plating

Plating

(OP)
What is a standard thickness tolerance on yellow zinc dichromate plating for fasteners (tread)

RE: Plating

Zinc plating plus yellow chromate is commonly specified as 9 micrometers minimum thickness.  It can be as low as 5 micrometers if the corrosion requirement is low or as high as 25 micrometers when greater corrosion resistance is required.

RE: Plating

(OP)
If 9mm is the standard min. what is the standard max.?

I don't want to spec something out of the norm

RE: Plating

hockeyb-- not 9mm, 9um!

RE: Plating

(OP)
Woops, sorry

Is there a standard max?

RE: Plating

No, there is not a standard maximum.  One GM standard limits the maximum to be twice the minimum thickness.

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